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Condensed Matter papers — page 252

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Scaling Model of Annihilation-Diffusion Kinetics for Charged Particles with Long-Range Interactions
We propose the general scaling model for the diffusio n-annihilation reaction A+ + A- with long-range power-law i nteractions. The presented scaling arguments lead…
Sergei F. Burlatsky, Valeriy V. Ginzburg, Noel A. ClarkJun 24, 1996
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Exact results for interacting electrons in high Landau levels
We study a two-dimensional electron system in a magnetic field with a fermion hardcore interaction and without disorder. Projecting the Hamiltonian onto the n-th Landau level, we show that the…
R. Moessner, J. T. ChalkerJun 24, 1996
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Memory function approach to the Hall constant in strongly correlated electron systems
The anomalous properties of the Hall constant in the normal state of high-Tc superconductors are investigated within the single-band Hubbard model. We argue that the Mori theory is the appropriate…
Ekkehard LangeJun 24, 1996
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Large-N Eigenvalue Distribution of Randomly Perturbed Asymmetric Matrices
The density of complex eigenvalues of random asymmetric N× N matrices is found in the large-N limit. The matrices are of the form H0+A where A is a matrix of N2 independent,…
Boris A KhoruzhenkoJun 24, 1996
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On Asymptotic Properties of Large Random Matrices with Independent Entries
We study the normalized trace gn(z)=n-1 tr \, (H-zI)-1 of the resolvent of n× n real symmetric matrices H=[(1+δjk)Wjk/ n]j,k=1n assuming that their…
Alexei M. Khorunzhy, Boris A. Khoruzhenko, Leonid A. PasturJun 24, 1996
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Almost-Hermitian Random Matrices: Eigenvalue Density in the Complex Plane
We consider an ensemble of large non-Hermitian random matrices of the form H+iAs, where H and As are Hermitian statistically independent random N× N matrices.…
Yan V. Fyodorov, Boris A. Khoruzhenko, Hans-Juergen SommersJun 24, 1996
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Interplay of charge and spin correlations in nickel perovskites
Analyzing the motion of low--spin (s=1/2) holes in a high--spin (S=1) background, we derive a sort of generalized t--J Hamiltonian for the NiO2 planes of Sr--doped nickelates. In addition…
J. Loos, H. FehskeJun 24, 1996
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Theory of short-range magnetic order for the t-J model
We present a self-consistent theory of magnetic short-range order based on a spin-rotation-invariant slave-boson representation of the 2D t-J model. In the functional-integral scheme, at the…
C. Schindelin, U. Trapper, H. Fehske et al.Jun 24, 1996
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Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder
Low-temperature thermodynamic properties of the spin-1/2 Heisenberg ladder system with non-magnetic impurities are discussed using an effective Hamiltonian for the impurity-induced spins in the…
M. Sigrist, A. FurusakiJun 24, 1996
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Theory of Magnetic Short--Range Order for High-Tc Superconductors
A theory of magnetic short--range order for high--Tc cuprates is presented on the basis of the one--band t--t--Hubbard model combining the four--field slave--boson functional integral…
U. Trapper, D. Ihle, H. FehskeJun 24, 1996
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Spin susceptibility and magnetic short-range order in the Hubbard model
The uniform static spin susceptibility in the paraphase of the one-band Hubbard model is calculated within a theory of magnetic short--range order (SRO) which extends the four-field slave-boson…
U. Trapper, D. Ihle, H. FehskeJun 24, 1996
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Fragmentation of Colliding Discs
We study the phenomena associated with the low-velocity impact of two solid discs of equal size using a cell model of brittle solids. The fragment ejection exhibits a jet-like structure the direction…
F. Kun, H. J. HerrmannJun 24, 1996
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Particle-Flux Separation of Electrons in the Half-Filled Landau Level: Chargeon-Fluxon Approach
Mechanism of the particle-flux separation in the Chern-Simons gauge theory coupled with nonrelativistic fermions is studied in a nonperturbative method. This problem is very important for the…
I. Ichinose, T. MatsuiJun 24, 1996
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Multifractality of the quantum Hall wave functions in higher Landau levels
To probe the universality class of the quantum Hall system at the metal-insulator critical point, the multifractality of the wave function ψ is studied for higher Landau levels, N=1,2, for…
Takamichi Terao, Tsuneyoshi Nakayama, Hideo AokiJun 24, 1996
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Coulomb effects in artificial molecules
We study the capacitance spectra of artificial molecules consisting of two and three coupled quantum dots from an extended Hubbard Hamiltonian model that takes into account quantum confinement,…
F. Ramirez, E. Cota, S. E. UlloaJun 23, 1996
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The Current Carried by Bound States of a Superconducting Vortex
We investigate the spectrum of quasiparticle excitations in the core of isolated pancake vortices in clean layered superconductors. Analysis of the spectral current density shows that both the…
D. Rainer, J. A. Sauls, D. WaxmanJun 23, 1996
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Diffusion Thermopower at Even Denominator Fractions
We compute the electron diffusion thermopower at compressible Quantum Hall states corresponding to even denominator fractions in the framework of the composite fermion approach. It is shown that the…
D. V. KhveshchenkoJun 22, 1996
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Orbital Liquid in Perovskite Transition-Metal Oxides
We study the effects of the degeneracy of the eg orbitals as well as the double exchange interaction with t2g spins in perovskite transition-metal oxides. In addition to the spin field $…
Sumio Ishihara, Masanori Yamanaka, Naoto NagaosaJun 22, 1996
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Statistical mechanics of a correlated energy landscape model for protein folding funnels
Energetic correlations due to polymeric constraints and the locality of interactions, in conjunction with the apriori specification of the existence of a particularly low energy state, provides a…
Steven S. Plotkin, Jin Wang, Peter G. WolynesJun 21, 1996
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Statistics and Microphysics of the Fracture of Glass
The tensile strength of fused silica fibers is believed to approach its intrinsic value at low temperature, and modern experiments indicate very small, perhaps unmeasured, intrinsic dispersion in…
J. I. KatzJun 21, 1996
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A Field Effect Transitor based on the Mott Transition in a Molecular Layer
Here we propose and analyze the behavior of a FET--like switching device, the Mott transition field effect transistor, operating on a novel principle, the Mott metal--insulator transition. The device…
C. Zhou, D. M. Newns, J. A. Misewich et al.Jun 21, 1996
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Edge Excitations of the ν= 2/3 Spin-Singlet Quantum Hall State
The spectrum of edge excitations is derived for the spin-unpolarized ν= 2 and ν= 2/3 FQHE. Numerical diagonalization of a system of six electrons on a disc confirms that the edge ν= 2/3…
J. E. Moore, F. D. M. HaldaneJun 21, 1996
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Landau Level Mixing and Levitation of Extended States in Two Dimensions
We study the effects of mixing of different Landau levels on the energies of one-body states, in the presence of a strong uniform magnetic field and a random potential in two dimensions. We use a…
F. D. M. Haldane, Kun YangJun 21, 1996
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Fermion Analogy for Layered Superconducting Films in Parallel Magnetic Field
The equivalence between the Lawrence-Doniach model for films of extreme type-II layered superconductors and a generalization of the back-scattering model for spin-1/2 electrons in one dimension is…
J. P. RodriguezJun 21, 1996
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Origin of Magic Angular Momentum in a Quantum Dot under Strong Magnetic Field
This paper investigates origin of the extra stability associated with particular values (magic numbers) of the total angular momentum of electrons in a quantum dot under strong magnetic field. The…
Taku Seki, Yoshio Kuramoto, Tomotoshi NishinoJun 21, 1996
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